#!/usr/bin/env python3
"""
脚本名称：ch16_exe.py
功能描述： 读写文件
作者：Gavin
创建日期：2022-05-06
版本：1.0
依赖库：无
使用方法： python ch16_exe.py test.txt
"""

from sys import argv

script, filename = argv

print("We're going to erase %r." % filename)
print("If you don't want that, hit CTRL-C (^C).")
print("If you do want that, hit RETURN.")
input("?")

print("Opening the file...")
target = open(filename, 'w')
print("Truncating the file. Goodbye!")

target.truncate()
print("Now I'm going to ask you for three lines.")

line1 = input("line 1: ")
line2 = input("line 2: ")
line3 = input("line 3: ")

print("I'm going to write these to the file.")

target.write(line1)
target.write("\n")
target.write(line2)
target.write("\n")
target.write(line3)
target.write("\n")

print("And finally, we close it.")
target.close()
